Three-phase voltage changer

A three-phase voltage and converter technology, used in transformers, fixed transformers, circuits, etc., can solve the problems of bulky, difficult to maintain, and complex structure, and achieve the effect of maintenance-free, simple structure and convenient use.

Inactive Publication Date: 2010-12-08
SHANXI FENXI ELECTROMECHANICAL
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AI Technical Summary

Problems solved by technology

[0003] The three-phase voltage converter provided by the present invention solves the problem that the existing AC transformer converts the AC voltage at the output terminal of the capacitor into a low-voltage AC voltage to drive the voltage indicator to realize the indication of the capacitor voltage. Difficult to maintain technical issues

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Embodiment Construction

[0014] A three-phase voltage converter, comprising a barrel-shaped insulating outer casing 1, a core frame 2 with a herringbone cross-section fixedly arranged in the barrel-shaped insulating outer casing 1, and arranged between the insulating outer casing 1 and the core frame 2 Resin and quartz sand filler 3, an upper support plate 5 is provided at the barrel mouth of the barrel-shaped insulating outer shell 1, and three terminal posts 4 and three high-voltage lead terminals are respectively arranged on the concentric circles on the upper support plate 5 6. A low-voltage lead terminal 9 is set at the center of the upper support plate 5, and a set of series resistor element groups 7 are set on each sub-support of the herringbone core frame 2, and the series resistor element groups 7 are in the barrel The body is vertically arranged up and down, the upper end of the resistor element group 7 is a low-voltage end and is connected with the low-voltage lead terminal 9, the lower end ...

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Abstract

The invention discloses a three-phase voltage changer which solves the technical problems of large size, complex structure and difficult underground maintenance of the traditional equipment. The three-phase voltage changer comprises a barrel-shaped insulating shell (1), a lambada-shaped core frame (2) and a resin and quartz sand filler (3), wherein the barrel mouth of the barrel-shaped insulating shell (1) is provided with an upper supporting plate (5), and three binding posts (4) and three high-voltage lead terminals (6) are symmetrically arranged on the concentric circle of the upper supporting plate (5); a set of serial resistor element groups (7) is arranged on each branch supporting frame of the lambada-shaped core frame (2); and high-voltage ends of the serial resistor element groups (7) are connected together with the high-voltage lead terminals (6), and two ends of a last divider resistor R at the low-voltage ends of the serial resistor element groups (7) are respectively connected with the binding posts (4) and a low-voltage lead terminal (9) together. The invention provides a practical indication device of capacitor voltage for a reactive power compensation device for underground mines.

Description

technical field [0001] The invention relates to a voltage converter, in particular to a three-phase AC voltage converter. Background technique [0002] At present, the main component of 1140V or 660V underground reactive power compensation device is a capacitor. In order to meet the requirements of safe use in coal mines, a voltage indicator must be provided at the capacitor output of the underground reactive power compensation device. The existing technology is to use The AC transformer converts the AC voltage at the output end of the capacitor into a low-voltage AC voltage to drive the voltage indicator to realize the indication of the capacitor voltage. However, the AC transformer has technical problems such as large volume, complex structure, and difficult maintenance in underground. Contents of the invention [0003] The three-phase voltage converter provided by the present invention solves the problem that the existing AC transformer converts the AC voltage at the ou...

Claims

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Application Information

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IPC IPC(8): H02M5/12H01F30/12H01F27/40
Inventor 兰秀林
Owner SHANXI FENXI ELECTROMECHANICAL
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